Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

2.5K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
2.5K
Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Overview01:20

Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Overview

20.5K
The Fischer esterification reaction was developed by the German chemist Emil Fischer in 1895. It is a condensation reaction between carboxylic acids and alcohols in an acidic medium to give esters and water.
20.5K
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

3.1K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
3.1K
Acid-Catalyzed Hydration of Alkenes02:45

Acid-Catalyzed Hydration of Alkenes

17.0K
Alkenes react with water in the presence of an acid to form an alcohol. In the absence of acid, hydration of alkenes does not occur at a significant rate, and the acid is not consumed in the reaction. Therefore, alkene hydration is an acid-catalyzed reaction.
17.0K
Leveling Effect01:29

Leveling Effect

1.3K
In acid-base chemistry, the leveling effect refers to the limitation imposed by the solvent on the strength of acids and bases in solution. When a base stronger than the solvent's conjugate base is used, it deprotonates the solvent until the base is entirely consumed, making it ineffective against weaker acids. Conversely, an acid stronger than the solvent's conjugate acid protonates the solvent until the acid is depleted, rendering it ineffective against weaker bases. Essentially, the...
1.3K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

2.2K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
2.2K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Hypoxia-driven tumor immune escape: mechanisms and therapeutic opportunities.

Frontiers in immunology·2026
Same author

Gut-heart axis at high altitude: a dynamic mediator from hypoxic dysbiosis to adaptive cardioprotection.

Frontiers in microbiology·2026
Same author

Shengxian decoction suppresses malignant progression of lung adenocarcinoma by enhancing CD8<sup>+</sup> T cell function via the FYN-PI3K/AKT axis.

Chinese medicine·2026
Same author

Nanocurcumin attenuates brain injury in rats with desert dry‑heat‑induced exertional heat stroke by suppressing TLR4/MyD88/NF‑κB signaling.

Molecular medicine reports·2026
Same author

Revealing Metal-Node-Dependent Intralayer Conjugation and Thickness-Dependent Interlayer Interactions in Photoconductive MOFs.

The journal of physical chemistry letters·2026
Same author

First-in-human evaluation of [<sup>18</sup>F]-AlF-NOTA-neurotensin for NTSR1-targeted imaging of prostate cancer: a head-to-head comparison with [<sup>68</sup>Ga]Ga-PSMA-617.

Annals of medicine·2026

相关实验视频

Updated: Jan 18, 2026

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
10:22

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer

Published on: November 30, 2020

3.9K

通过酸相互作用使多聚烯混合物相容

Yucheng Yuan1, Jiawei He2, Tuhin Ganguly3

  • 1Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States.

Journal of the American Chemical Society
|January 16, 2026
PubMed
概括

这项研究引入了一种简单的光催化方法,使混合聚烯可回收. 酸基改性聚烯作为兼容剂,显著提高混合物的可塑性,并使消费后的废物能够回收利用.

更多相关视频

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
08:12

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

3.9K
Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by &#960;-&#960; Stacking Interactions
10:53

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

14.6K

相关实验视频

Last Updated: Jan 18, 2026

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
10:22

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer

Published on: November 30, 2020

3.9K
Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
08:12

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

3.9K
Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by &#960;-&#960; Stacking Interactions
10:53

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

14.6K

科学领域:

  • 材料科学
  • 聚合物化学
  • 可持续的化学

背景情况:

  • 聚烯是广泛使用的,但由于不兼容,很难回收利用.
  • 现有的回收方法往往复杂或降低材料性能.

研究的目的:

  • 开发一种易于兼容混合聚烯的方法.
  • 提高聚烯混合物的可回收性和机械性能.

主要方法:

  • 一个单阶段的光催化过程,将酸或功能引入聚烯.
  • 在混合物中使用酸和改性聚烯作为兼容剂.

主要成果:

  • 在机械强度和柔性方面取得了显著的改善 (增加了多达96倍).
  • 消费后的多烯混合物的有效兼容性.
  • 成功完成了聚烯混合物的直接功能化和兼容性.

结论:

  • 通过光催化功能化的酸相互作用为聚烯相容提供了可行的途径.
  • 这种方法提高了混合聚烯的可回收性和性能,包括消费后的废物.
  • 这种方法是高效的,单步的,并保留了原始材料的特性.